Fiber Optics Old fiber support gigabit?
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Subject Author Date
Old fiber support gigabit? cippy 04-03-09
Posted by cippy on April 3, 2009, 5:21 am
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Can I use a 8 year multimode fiber cable sc terminated with recent 3com
switch? Now there are some old 3com switches with 100baseSx transeicever...
I would use them with 1000base-sx... can I?
thanks



Posted by Arnie on April 3, 2009, 9:00 am
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> Can I use a 8 year multimode fiber cable sc terminated with recent 3com
> switch? Now there are some old 3com switches with 100baseSx transeicever...
> I would use them with 1000base-sx... can I?
> thanks

That will depend on the MM fibre type 50/125 or 62.5/125 and on the
distances. If they are according the OM1 or OM2 standard the will
reach 30 or 80 meter.

Arnie

Posted by Ergyn Sadiku on April 13, 2009, 8:39 am
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> Can I use a 8 year multimode fiber cable sc terminated with recent 3com
> switch? Now there are some old 3com switches with 100baseSx transeicever.=
..
> I would use them with 1000base-sx... can I?
> thanks

It all depends on the size of the core (50/125 or 62.5/125) the MM
has. And the distances.

For 1Gb/s link with 1000base-SX we have:

OM 1, 62.5=B5m goes up to 275m
OM 2, 50=B5m up to 550m
OM 3, 50=B5m up to 1100m
OM 3+, 50=B5m up to 1100m

all @ 850nm.

Ergyn

Posted by Arnie on April 17, 2009, 8:13 am
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>
> > Can I use a 8 year multimode fiber cable sc terminated with recent 3com
> > switch? Now there are some old 3com switches with 100baseSx transeiceve=
r...
> > I would use them with 1000base-sx... can I?
> > thanks
>
> It all depends on the size of the core (50/125 or 62.5/125) the MM
> has. And the distances.
>
> For 1Gb/s link with 1000base-SX we have:
>
> =A0 OM 1, 62.5=B5m goes up to 275m
> =A0 OM 2, 50=B5m up to 550m
> =A0 OM 3, 50=B5m up to 1100m
> =A0 OM 3+, 50=B5m up to 1100m
>
> all @ 850nm.
>
> Ergyn

Yes, you are right, my values were for 10 Gbit/s.

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